J. Barren, G. L. Bryant, M. Garbauskas
Aug 15, 1995
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Journal
Acta Crystallographica Section C-crystal Structure Communications
Abstract
The title compound, 3,9-(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, (1), C 33 H 50 O 6 P 2 , has three different conformers in the unit cell. The structure of each is very similar to the others, differing principally in the rotational conformations of the aryl tert-butyl groups. The remaining portion of the structure comprises two six-membered rings, each in a chair conformation and sharing a common spiro atom. Bond angles and bond lengths in the spiro rings are very similar to those of the related molecule 3,9-dimethoxy-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane [Carpenter, Jacobson & Verkade (1979). Phosphorus Sulfur, 6, 475-479].